When to plant hyacinths in Oslo: 19 September – 9 November

In Oslo, hyacinth: plant from 19 September to about 9 November. For planting stock, the places nearby include Mester Grønn (garden centre, 2 km) and Plantasjen Frogner (garden centre, 2 km); addresses and opening hours are below.

Bulbs are best planted early in the window: late-planted bulbs may flower later or less well. Late planting works only while the soil can be dug. Mulch after planting.

The date is about two weeks before the average daily temperature here falls below 0 °C (ten years of weather): an estimate, not the day the ground freezes, and a cold spell can freeze it earlier. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS, how the ground freezes (NRC Canada, CBD-26).

Hyacinth in Oslo: soil, season and weather

Nights then average below 0 °C in November–March; the coldest, January, averages -6.9 °C.

Planting	19 September – 9 November
First autumn frost	19 October
Coldest nights	January, -6.9 °C
Soil back at 1 °C in spring	9 April
Daylight	12:36 on 19 September
Daylight at the winter solstice	5:54

The same dates in Oslo hold for Garlic, Tulip, Daffodil and Crocus.

Hyacinth in Oslo: depth, winter cold, pests and pets

Plant hyacinths 10 cm deep, at least 7.5 cm apart (RHS). In the ground hyacinths are fully hardy, but in containers they can be frost tender in cold winters (RHS); here winter nights average below 0 °C, so wrap the pots or move them to a sheltered spot.

In Oslo the average daily temperature stays at 10 °C or lower for about 33 weeks a year (our estimate from ten years of monthly weather). For this bulb Wisconsin Horticulture Extension gives a cold period of 12–15 weeks at about 2–10 °C. The winter here gives that in the ground, so the bulbs need no pre-chilling.

Flowers get smaller in the years after planting: for full spikes, replace the bulbs or add a few new ones each autumn (RHS).

If squirrels are a problem, protect the bulbs with wire mesh (RHS). Hyacinths are toxic to dogs, cats and horses: intense vomiting and diarrhoea (ASPCA).

Sources: RHS, Wisconsin Horticulture Extension, ASPCA.

Hyacinth in nearby cities

All the nearest cities on our list plant hyacinth later than Oslo; the closest date is in Stockholm, 9 days later.

City	Distance	Date	Difference
Stockholm	416 km	28 September – 5 December	9 days later
Copenhagen	483 km	20 October – end of December	31 days later
Kiel	623 km	21 October – end of December	32 days later
Rostock	652 km	18 October – end of December	29 days later
Hamburg	709 km	20 October – end of December	31 days later
Szczecin	757 km	18 October – end of December	29 days later

Where to buy hyacinth for planting in Oslo

Planting stock goes into the ground from 19 September to about 9 November; buy it before that. Within 15 km of Oslo OpenStreetMap lists 21 garden centres, 1 farm-supply shop, 1 market and 2 farm shops (collected 7 October 2026).

Gårdsbutikken på Schrader Gartneri — garden centre
Mon–Fri 10:00–17:00; Thu 10:00–18:00; Sat–Sun 10:00–16:00 · 10 km · schrader.no
Schrader Gartneri — garden centre
Mon–Fri 10:00–17:00; Sat–Sun 10:00–16:00 · 10 km · schrader.no
Bryn Gartneri — garden centre
Mon–Fri 10:00–17:00; Sat 10:00–16:00; Sun 12:00–16:00 · 15 km · bryngartneri.no
Plantasjen Bærum — garden centre
Mon–Fri 10:00–20:00, Sat 10:00–18:00, Sun 12:00–18:00 · 14 km
Mester Grønn — garden centre
Mon–Fri 10:00–20:00, Sat 10:00–18:00, Sun 12:00–18:00 · 2 km
Plantasjen Frogner — garden centre
Mon–Fri 10:00–19:00, Sat 10:00–18:00, Sun 12:00–18:00 · 2 km
Plantasjen Storo — garden centre
Mon–Fri 10:00–20:00, Sat 10:00–18:00, Sun 12:00–18:00 · 4 km
Plantasjen Vinderen — garden centre
Mon–Fri 10:00–18:00, Sat 10:00–18:00, Sun 12:00–18:00 · 5 km

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